On the June 11 episode, Eric Nam and MAMAMOO’s Solar arrange a “self wedding,” exchanging their vows and rings while busking in front of a small crowd. Eric Nam starts off by singing the nuptial song himself, serenading Solar with his rendition of Jason Mraz’s “Lucky.”

After he finishes singing, Eric Nam takes Solar’s hand and tells her, “I think that I have very good luck, because I got to marry my best friend.”

Solar responds by singing Elvis Presley’s “Love Me Tender,” and surprises Eric Nam with a letter that she wrote herself. In her interview with the producers, Solar confesses she almost cried while reading the letter and looked only at the paper. She says that since she was overcome with emotion, she was afraid that she would actually cry if she looked Eric Nam in the eye.

After the two exchange rings, they wrap up the wedding ceremony with a touching rendition of Mariah Carey’s “Endless Love.” Watch the adorable exchange below!